Adhesive rosinous preparatios and process of producing the same.



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Be it'lmown that I, HANS vVo rna oitiz'enof the German E1npire,"and residing at Berlin, Germany, have invented certain new and useful Improved ;Adhesive .R'osi'nous Preparations and ,Process of Producing the Same, of which the following is a specification.

resins. y I In the paintingand varnishing trades it is well-known to. employ adhesive rosin masses for certain purposes, and also in' the gil-ding trade, Likewise, adhesive mixtures of rosins, such as gum mastic solutions for example, are used for attaching beardsand wigs. Recently, such adhesive rosin solutions have also been employed in. medicine for fixing bandages. Now it has been found that the adhesiveness of all these rosin solutions is only small and very uncertain, which is a very great defect particularly when attaching beards and wigs with such adhesive rosin solutions. i primary object of my inventionis to provide rosinous mixtures which are distinguished by specially great adhesiveness. I have found that when the solvent of rosin solutions has been evaporated a strong and very adhesive residue is obtained when an admixture of small quantities of liquid esters of the aromatic acids have been added to the solutions. It is then not necessary to use such relatively expensive rosins as mas tic, but cheaper rosins, such as colophonium and the like canbe employed. Also, gum resins and balsams can then be employed for the present purpose. a s

As solvent, benzol has been found to be specially advantageous; other relatively readily volatile solvents may however be employed, such as benzin, chloroform, alcohol, ether and the like, as well as mixtures of these solvents. In the case of adhesive sub stances such as glue for beards, which are applied directly on the skin, it'is preferable,

however, not to employ such a solvent as chloroform which is adapted to irritate the skin.

The following example will serve for ex plaining my invention :-15 parts colophonium. and 15 parts sandarac are dissolved n 7 0 parts benzoh and 5 parts benzoic ethylic ether are added thereto.

. Specification of Letters latenta- Patien'h d Application filed reven e as; 1912'. Seriallio. 734.2113. T '1' My invention 'relates to processes for. inspreasmg the adhesiveness of mixtures of The present inventionl'can sewerawnitageously employed in connection with: the mastic. bandages which fhave' recentlyj sen proposed by Dr. von Qettingeii .and }'-are made with mastic. .Cl1loro1form.was 'ge ier ally used for these as the soliiennbut itsuse has thedefect that small quantitiesof it were retained by the (mastic; the adhesive ag nt.

action. of the; mastic sa sa es made," with} such chloroform solutions jis perhaps; re

stricted and, on theother h of the skin is causedl'wli very undesirable secondary 1 already been proposed to; substitute the chloroform by benzol and the like, but the, solutions made wit-hit were considerably iiiferiorin adhesiveness andlalso in the'dura tion of the adhesivenessto the chloroform;

mastic solutions: employingQthe. above-described new process, fo jthefmanue facture of such mast c solutions used for mastic bandages it has been found that the adhesiveness can be very considerably increased in this case also by adding small quantities of the liquid esters of the mo matic acids. By employing the mentioned admixtures it is also possible to add to the mastic other resins, gum-rosins orbalsams, and thus to replace part of the mastic by cheaper rosins, without materially diminishing. the adhesiveness' of such rosin plasters.

The following are examples of esters which maybe used Benzoic ethylic ether C I-I -COOG H Benzoic benzylic ether C H OOC H Benzoic methylic ether CAL-COUCH Salicylo vethylic ether c npuooo n Salicylo methylic ether C ILOHCOOCIL.

It is thus possible not only to cheape'n the solutions used in making mastic plaster, but also to avoid using in their preparation the expensive and dangerous chloroform which, as stated above, has various disadvantages attached to it in medicinal practice.

The following will serve for explaining more clearly this mode of carrying my invention into practice :If a solution of equal parts of mastic and colophonium in benzol is made it is found that the residue remaining after the evaporation of the excess of benzol has an adhesiveness -which is neither sufficient in practice nor of long duration. If a sinall quantity, say 5%, of aliquid ester of an aromatic acidbe added, howeventhe adadded.

1 iar-t benzoic methylic-ether are'added.

duration.

jcolophonium are-dissolved in 70 parts hen-- Went-ion,however, distinguishes from such a hesiveness is materially increased, so that it suflices for the most severelystrained bandages and the likeand is of almost unlimited Example 1: 15 parts mastic and 15 parts colophonium are dissolved in 70-..p'arts benzol and 5 parts salicylo methylic ether are Instead of benzol, a more volatile solvent of rosin may be used, e.-'g., benzol, petrolether and the like, which are not capable of causing irritation of the skin. v A Example 2: 15 parts mastic and 15 parts. colophonium are dissolved in 70. parts benzol and 2 parts salicylo, methylic ether and xample 3115 parts mastic and'l5 parts Z01 and ben'zoic benzylic ether-and 2.5 benzoic ethylic ether are added.

Example- 4: 10 parts mastic are dissolved in 15 parts benz' ol. and.1.5.parts benzoic ethylic ether are'addedr r I v To heat rosins with plitalic acid ethers in order to dissolve them in the phtalic' acid esters is already known. I Thepresent inprocess in'that the esters are not used as means to effect the solution but theordrnary solvents, as benzol, chloroform, etc.,.

are employed, and to. this solution when cold isladded a small qu'antityof a liquid ester of an aromatic acid inorder to increase the adhesive power.

1. A process for increasing the adhesiveness of rosin mixtures, consisting in dissolv ing a rosin mixture ina common solvent 6f rosin and adding a small quantity of a liquid ester of an aromatic acid. 2-.A- process for increasing the adhesiveness of rosin mixtures, consisting in-dissolving a rosin mixture in a common solvent of rosin and adding a small quantity of a mix- I ture of liquid esters of aromatic acids.

3. A processfor increasing the adhesiverosin-in a common solvent of rosin, and in mixing the solution .thus obtained with a matic acid.

4:. A process for increasing the adhesiveness of rosin mixtures, consisting in dissolving a rosin mixture containing mastic rosin in benzol, and in mixing the solution thus obtained with a small quantity of a liquid ester of an aromatic acid.

A plaster consisting of a rosin mixture containing mastic and a small percentage of a-liquid ester of an aromatic acid.

l In testimony whereof, I aflix my signature in the presence of'two witnesses.

DR. HANS WOLFF. I Witnesses:

HENRY 11mm, WOLDEMAR HAUPT.

ness of rosin mixtures, consisting in dis- ,solvlng aros1n mixture containing mastic 'small quantity of a liquid ester of an aro- 

